Stability of Carbanion

Q. Arrange the following in increasing order of their $p{K}_a$ value :

1. $\left(a\right)<\left(b\right)<\left(c\right)$
2. $\left(a\right)<\left(c\right)<\left(b\right)$
3. $\left(b\right)<\left(a\right)<\left(c\right)$
4. $\left(c\right)<\left(b\right)<\left(a\right)$

Q. Which of the phenol derivatives is the weakest acid?

1. A
2. B
3. C
4. D

Q. Arrange the following in correct order of acidic strength:
$\left(I\right)C{H}_3-N{O}_2\left(II\right)N{O}_2-C{H}_2-N{O}_2\left(III\right)C{H}_3-C{H}_2-N{O}_2\left(IV\right)N{O}_2-CH\left(N{O}_2\right)-N{O}_2$

1. IV > II > I > III
2. IV > II > III > I
3. III > I > II > IV
4. III > I > IV > II

Q. Which of the following compound contains most acidic hydrogen?

1. $HC\equiv CH$
2. $C{H}_{3}OH$
3. $N{H}_3$
4. $H_{2}C=C{H}_2$

Q. Rank the following in decreasing order of basic strength is:

1. B > A > D > C
2. D > A > B > C
3. A > D > B > C
4. A > D > C > B

Q. Which of the following phenols has the largest $p{K}_a$ value (i.e., least acidic)?

1. 
2. 
3. 
4. 

Q. What will be the conjugate bases for the Bronsted acids $HF,H_2{SO}_4$ and ${HCO}_3^{-}$?

Q. Write the resonance structures of $C{O}_3^{-2}$ and ${HC{O}_3}^{-}$.

Q. Why CO2 can not bent or angular shape and this compound similar to H2O and we know that H2O is bent shape, So why we can not say that Co2 is also angular shape

Q. Arrange the marked hydrogens (a, b and c) in increasing order of their acidic strength :

1. (c) > (b) > (a)
2. (a) > (b) > (c)
3. (b) > (a) > (c)
4. (a) > (c) > (b)

Q. Considering greater polarization in LiCl compared to that in NaCl, which of the following statements you would expect to be wrong?

1. LiCl dissolves more in organic solvents than NaCl
2. LiCl has lower melting point than NaCl
3. LiCl will ionize in water more than NaCl
4. Fused LiCl would be less conducting than fused NaCl

Q. Which of the following carbanions is the most stable?

1. 
2. 
3. 
4. 

Q. Increasing order of acidic strength of given compounds is:

1. $I<II<IV<III$
2. $III<I<IV<II$
3. $IV<I<III<II$
4. $I<III<IV<II$

Q. Fill in the blanks
The ___ effect is defined as the polarity produced in the molecule by the interaction of two pi bonds or between a pi bond and lone pair of of electrons present on the adjacent atom

Q. $C{H}_{3}C{H}_{2}COOH>(C{H}_3{)}_{2}CHCOOH>(C{H}_3{)}_{3}CCOOH$

Q. Which one of the following carbocations are most stable ?

1. 
2. 
3. 
4. 

Q.

out of flurine and iodine which has higest electron gain enthalpy

Q. Justify giving reactions that among halogens, fluorine is the best oxidant and among hydrohalic compounds, hydroiodic acid is the best reductant.

Q. Which of the followings are Lewis acids?
$H_{2}O,{BF}_3,H^{+},$ and ${NH}_4^{+}$